90040534 has 32 divisors (see below), whose sum is σ = 150815520. Its totient is φ = 40115712.

The previous prime is 90040529. The next prime is 90040553. The reversal of 90040534 is 43504009.

It is a junction number, because it is equal to n+sod(n) for n = 90040499 and 90040508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51397 + ... + 53119.

It is an arithmetic number, because the mean of its divisors is an integer number (4712985).

Almost surely, 2^90040534 is an apocalyptic number.

90040534 is a deficient number, since it is larger than the sum of its proper divisors (60774986).

90040534 is a wasteful number, since it uses less digits than its factorization.

90040534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 90040534 is about 9488.9690693984. The cubic root of 90040534 is about 448.2077420618.

The spelling of 90040534 in words is "ninety million, forty thousand, five hundred thirty-four".